LiDAR and 360 degree Video
​LiDAR which stands for 'Light Detection And Ranging' is a remote sensing & surveying technology that measures distance by illuminating a target with a pulsed laser light. These light pulses combined with other data recorded by suitable Mapping systems generate precise, three-dimensional information about the shape of the Earth and its surface characteristics. LiDAR mapping, sometimes referred to as '3D laser scanning' is popularly used as a technology to make high-resolution maps, with applications in geodesy/geomatics, with terrestrial, airborne & mobile mapping methods.
Mobile LiDAR is an advanced mapping solution that incorporates the most advanced LiDAR sensors, cameras and position/navigation/DGPS receivers to collect survey grade 3D point cloud data quickly and accurately.
Survey Grade Mobile LiDAR mapping is the process of collecting geospatial data from a mobile vehicle, typically fitted with a LiDAR remote sensing systems. Such systems are composed of an integrated array of time synchronized navigation sensors (survey grade DGPS) and imaging sensors mounted on a mobile platform. The primary output after pre-processing from such systems include; geo-referenced 3D point cloud data, digital maps, images and videos. The overall accuracy of the data which can be easily achieved is about +/- 2 cm.

Marrath has procured 'Leica Pegasus One & Leica Pegasus Two' Mobile Lidar systems and has capacity of capturing high precision data of upto +/- 2 cm about 360 Kms per day. The Pegasus system captures dense 3D point cloud data with calibrated imagery and enables processing, visualization and mapping through user-friendly software platform "Leica Auto PP & Leica Map Factory Advanced". It provides plug-and-play hardware including cameras and LiDAR sensors, enabled by a software solution to control data acquisition, calibration, post-processing, viewing, editing and storage modules.
Mobile mapping allows rapid collection of all visible assets from a moving vehicle driving at posted speeds. This cutting-edge Mobile LiDAR technology provides a rich, high-density dataset that measures about one million 3D points per second. This Leica Pegasus system gives a unique & complete Survey grade mobile mapping solution to our clients with high speed & accuracy. The system can be mounted on any four wheeler vehicle & can capture high precise data upto +/- 2 cm for about 100 Km of Highways in one day, which would have taken at least a month using primitive Electronic Total Stations (ETS) method.

Screenshot of 3D Scan point cloud data of an urban street in 'Leica Map Factory'
Further, after post processing & feature extraction of the 3d point cloud data, output in desired format like Autocad *.dwg or Arc GIS *.shp files can be obtained.

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Advantages of using Mobile
LiDAR over Conventional Total
​ Stations

• Field data capture can be done with great speed which gathers all required data point measurements in one pass, eliminating the need for additional mobilization costs.
• Mobile LiDAR gives the ability to collect up to 1 million points per second, compared to one point every few minutes with traditional Total Station survey technology, which save lots of time in field.
• Data Capture using mobile LiDAR is very efficient in sensitive areas or areas with extreme harsh climates.
• The captured data gives complete information about the site, with accurate point measurements and the ability to locate features that may be inaccessible with other methods.
• The data captured once can be used for different applications afterwards.
• Collected Pictures and images can be used to generate videos which can assist in decision making in the office, thereby reducing the frequency of site visits.
• Manpower required is considerably less, which adds to the savings in the overall project costs.
• Lesser chances of human error, process is more automated.
• The accuracy obtained is absolute, depending on the GPS and is not compounding in nature.
• Provides increased safety for project personnel and the general public because data can be collected remotely, removing the need for traffic diversion.

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